Abstract:Taking Jvxian county in Shandong province as an example, thermal physical parameters of different rock and soil masses in shallow geothermal energy in Jvxian county have been summarized based on field investigations, thermal physical testing of rock and soil samples, water sample testing, onsite thermal response testing and geothermal monitoring. The thermal diffusivity and specific heat capacity of rock and soil mass are negatively correlated with their density, while the coefficient of thermal conductivity of rock and soil mass is positively correlated with their density. The chemical interaction between shallow geothermal water and rocks has not reached equilibrium, and the waterrock reaction is weak. The spatial distribution characteristics of shallow geothermal fields indicate that the northern Quaternary system is thicker and has a higher ground temperature, while the southwest is dominated by Hongtuya group and Tianjialou group, which exhibit lower ground temperatures. This study lays the groundwork for the adaptive evaluation of shallow geothermal energy heat exchange methods in Jvxian county and for estimating shallow geothermal energy resources. It will provide a significant reference value for the design and operation of ground source heat pump systems.
